Reset loop numbers in RecomputeLoopInfo (#56981)

They become stale after optimizations.

diff --git a/src/coreclr/jit/compiler.cpp b/src/coreclr/jit/compiler.cpp
index 20aafd4..2c35262 100644 (file)
--- a/src/coreclr/jit/compiler.cpp
+++ b/src/coreclr/jit/compiler.cpp
@@ -5388,6 +5388,7 @@ void Compiler::RecomputeLoopInfo()
     for (BasicBlock* const block : Blocks())
     {
         block->bbFlags &= ~BBF_LOOP_FLAGS;
+        block->bbNatLoopNum = BasicBlock::NOT_IN_LOOP;
     }
     fgComputeReachability();
     // Rebuild the loop tree annotations themselves